scholarly journals Evaluation of Chromosomal Instability in Diabetic Rats Treated with Naringin

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Saleh A. Bakheet ◽  
Sabry M. Attia
Keyword(s):  
Chromosomal Instability ◽  
De Novo ◽  
Diabetic Rats ◽  
Secondary Malignancy ◽  
Diabetic Patients ◽  
Dependent Manner ◽  
Biochemical Alterations ◽  
Sperm Characteristic ◽  
Dna Strand ◽  
Germinal Cells

We used the bone marrow DNA strand breaks, micronucleus formations, spermatocyte chromosomal aberrations, and sperm characteristic assays to investigate the chromosomal instability in somatic and germinal cells of diabetic rats treated with multiple doses of naringin. The obtained results revealed that naringin was neither cytotoxic nor genotoxic for the rats at all tested doses. Moreover, naringin significantly reduced the diabetes-induced chromosomal instability in somatic and germinal cells in a dose-dependent manner. In addition, diabetes induced marked biochemical alterations characteristic of oxidative stress including enhanced lipid peroxidation, accumulation of oxidized glutathione, reduction in reduced glutathione, and accumulation of intracellular reactive oxygen species. Treatment with naringin ameliorated these biochemical markers dose-dependently. In conclusion, naringin confers an appealing protective effect against diabetes-induced chromosomal instability towards rat somatic and germinal cells which might be explained partially via diminishing thede novofree radical generation induced by hyperglycemia. Thus, naringin might be a good candidate to reduce genotoxic risk associated with hyperglycemia and may provide decreases in the development of secondary malignancy and abnormal reproductive outcomes risks, which seems especially important for diabetic patients.

scholarly journals Dose-response effect of prebiotic ingestion (β-glucans isolated from Saccharomyces cerevisiae) in diabetic rats with periodontal disease

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Diana Vilela Azzi ◽  
Andressa Naira de Jesus Pereira ◽  
Viviam de Oliveira Silva ◽  
Renata de Carvalho Foureaux ◽  
Andressa Ribeiro Veiga Lima ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Blood Glucose ◽  
Periodontal Disease ◽  
Alveolar Bone ◽  
Blood Glucose Control ◽  
Diabetic Rats ◽  
Metabolic Parameters ◽  
Male Rats ◽  
Diabetic Patients ◽  
Dependent Manner

Abstract Background Periodontal disease is one of the most frequent comorbidities in diabetic patients and can contribute to poor blood glucose control. Objective To evaluate the effects of ingesting different doses of beta-glucans (BG) isolated from Saccharomyces cerevisiae on alveolar bone loss (ABL) and inflammatory/metabolic parameters in normal and diabetic rats with ligature-induced periodontal disease (PD). Design Sixty male rats were assigned into two groups: non-diabetic or diabetic (i.p. 70 mg/kg streptozotocin) with PD. Then, groups were subdivided into five subgroups according BG doses: 0 mg/Kg; 10 mg/Kg; 20 mg/Kg; 40 mg/Kg or 80 mg/Kg. Animals received BG for 28 days and ligatures were placed on lower first molars during the last 14 days. Results ABL of diabetic and non-diabetic animals receiving BG 40 mg/kg (1.33 ± 0.03 mm and 0.77 ± 0.07 mm, respectively) and 80 mg/kg (1.26 ± 0.07 mm and 0.78 ± 0.05 mm, respectively) doses was lower (p < 0.05) in comparison to respective controls (1.59 ± 0.11 mm and 0.90 mm ±0.08). COX-2 (Control: 1.66 ± 0.12; 40 mg/kg: 1.13 ± 0.07; 80 mg/kg: 0.92 ± 0.18) and RANKL expressions (Control: 1.74 ± 0.34; 40 mg/kg: 1.03 ± 0.29 ;80 mg/kg: 0.75 ± 0.21), together with the RANKL/OPG ratio (Control: 1.17 ± 0.08; 40 mg/kg: 0.67 ± 0.09; 80 mg/kg: 0.63 ± 0.28) were attenuated above the same dose (p < 0.05). BG did not influence (p > 0.05) metabolic parameters in non-diabetic rats. In diabetic animals, doses above 40 mg/kg reduced IL-1β (Control: 387 ± 66; 40 mg/kg: 309 ± 27; 80 mg/kg: 300 ± 14) and TNF-α (Control: 229 ± 19; 40 mg/kg: 128 ± 53; 80 mg/kg: 71 ± 25), blood glucose levels (Control: 402 ± 49; 40 mg/kg: 334 ± 32; 80 mg/kg: 287 ± 56), total cholesterol (Control: 124 ± 8; 40 mg/kg: 120 ± 10; 80 mg/kg: 108 ± 9), LDL-c + VLDL-c (Control: 106 ± 8; 40 mg/kg: 103 ± 10; 80 mg/kg: 87 ± 10) and triacylglycerols (Control: 508 ± 90; 40 mg/kg: 301 ± 40; 80 mg/kg: 208 ± 61), whereas increased HDL-c (Control: 18 ± 0.5; 40 mg/kg: 19 ± 1; 80 mg/kg: 21 ± 1) (p < 0.05). Optimal dose needed to reduce ABL was higher in diabetic animals with PD. Conclusions BG ingestion reduced ABL and improved inflammatory profile in a dose-dependent manner. Best effects were achieved with doses above 40 mg/kg.

The Role of Protein Kinase C Activation in the Pathogenesis of Diabetic Vascular Complications

1999 ◽  
Vol 19 (2_suppl) ◽  
pp. 222-227 ◽  
Author(s):  
Joong Yeol Park ◽  
Sung-Woo Ha ◽  
George L. King
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
De Novo ◽  
Vascular Complications ◽  
Vascular Diseases ◽  
Diabetic Rats ◽  
Diabetic Patients ◽  
Diabetic Vascular Complications ◽  
Kinase C

Many vascular diseases in diabetes are known to be associated with the activation of the diacylglycerol (OAG)protein kinase C (PKC) pathway. The major source of OAG that is elevated in diabetes is de novo synthesis from glycolytic intermediates. Among the various PKC isoforms, the β-isoform has been shown to be persistently activated in diabetic animals. Multiple lines of evidence have shown that many vascular alterations in diabetes such as a decrease in the activity of Na+-K+ -adenosine triphosphatase (Na+-K+-ATPase), and increases in extracellular matrix, cytokines, permeability, contractility, and cell proliferation -are caused by activation of PKC. Inhibition of PKC by two different kinds of PKC inhibitors, LY333531, a selective PKC-β-isoform inhibitor, and d-α-tocopherol, were able to prevent or reverse the various vascular dysfunctions in diabetic rats. These results have also provided in vivo evidence that OAG-PKC activation could be responsible for the hyperglycemia-induced vascular dysfunctions in diabetes. Clinical studies are now being performed to clarify the pathogenic roles of the OAG-PKC pathway in developing vascular complications in diabetic patients.

scholarly journals Potential Effect of Polyphenolic-Rich Fractions of Corn Silk on Protecting Endothelial Cells against High Glucose Damage Using In Vitro and In Vivo Approaches

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3665
Author(s):  
Nurraihana Hamzah ◽  
Sabreena Safuan ◽  
Wan Rosli Wan Ishak
Keyword(s):  
Endothelial Cells ◽  
Protective Effect ◽  
High Glucose ◽  
Vascular Complications ◽  
Diabetic Rats ◽  
Diabetic Patients ◽  
Dependent Manner ◽  
Corn Silk

Endothelial cell dysfunction is considered to be one of the major causes of vascular complications in diabetes. Polyphenols are known as potent antioxidants that can contribute to the prevention of diabetes. Corn silk has been reported to contain polyphenols and has been used in folk medicine in China for the treatment of diabetes. The present study aims to investigate the potential protective role of the phenolic-rich fraction of corn silk (PRF) against injuries to vascular endothelial cells under high glucose conditions in vitro and in vivo. The protective effect of PRF from high glucose toxicity was investigated using human umbilical vein endothelial cells (HUVECs). The protective effect of PRF was subsequently evaluated by using in vivo methods in streptozotocin (STZ)-induced diabetic rats. Results showed that the PRF significantly reduced the cytotoxicity of glucose by restoring cell viability in a dose-dependent manner. PRF was also able to prevent the histological changes in the aorta of STZ-induced diabetic rats. Results suggested that PRF might have a beneficial effect on diabetic patients and may help to prevent the development and progression of diabetic complications such as diabetic nephropathy and atherosclerosis.

scholarly journals Effect of Consuming Different Varieties of Bambara Groundnut (Vigna subterranea) Seeds on Glycaemia and Lipid Profile of Diabetic and Non-Diabetic Rats

2021 ◽  
Vol 11 (5-S) ◽  
pp. 6-12
Author(s):  
Daniel Hassan Mhya ◽  
Abdulrashid Mohammed
Keyword(s):  
Lipid Profile ◽  
Diabetic Rats ◽  
Bambara Groundnut ◽  
Dietary Therapy ◽  
Diabetic Patients ◽  
Dependent Manner ◽  
Plant Seed ◽  
Continuous Increase ◽  
Group A ◽  
Group B

Background: Bambara groundnut seed is reported to possess high fibre and good nutritional content, and is locally used as a daily dietary therapy by diabetic patients in northern Nigeria. The plant seeds are of different varieties and whether the antidiabetic effect may vary with the varieties is largely unknown. This has prompted the current study to investigate effect of consuming different varieties of Bambara groundnut seeds on glycaemia and lipid profile of diabetic and non-diabetic rats. Materials and Methods: Bambara groundnut seed’s varieties were processed into flour and use in formulating feeds which were given to diabetic and non-diabetic rats as follows; group A (ALK01 feed), group B (ALK02 feed), group C (ALK03 feed), group D (ALK04 feed), group E (Basal feed), and group F (Normal animal’s feed) for 28 days during which blood glucose and weights were measured weekly while lipid profile was assayed at the end of the study. Results: The result of the study showed continuous increase in glycemic levels for diabetic rats fed basal and normal feeds compared to those fed plant seed formulated feeds. While, glycemic levels for non-diabetic rats fed plant seed formulated feeds, normal or basal feeds remain within normal range. The lipid components of diabetic rats fed basal and normal feeds were elevated and are significantly different (P<.05) from those fed plant seed formulated feeds. Conclusion: The study concluded that consumption of different varieties of Bambara groundnut seed could ameliorate hyperglycemia and hyperlipidemia by a variety dependent manner.  Keywords:  Bambara groundnut, seed varieties, effect, glycaemia, lipid profile, rats

The Morphology of the Rat Kidney Following Folic Acid Administration

1970 ◽  
Vol 28 ◽  
pp. 200-201
Author(s):  
Aline Byrnes ◽  
Elsa E. Ramos ◽  
Minoru Suzuki ◽  
E.D. Mayfield
Keyword(s):  
Folic Acid ◽  
De Novo ◽  
Specific Activity ◽  
Rat Kidney ◽  
Present Report ◽  
Intracellular Localization ◽  
Male Rats ◽  
Renal Hypertrophy ◽  
Electron Microscopic ◽  
Biochemical Alterations

Renal hypertrophy was induced in 100 g male rats by the injection of 250 mg folic acid (FA) dissolved in 0.3 M NaHCO3/kg body weight (i.v.). Preliminary studies of the biochemical alterations in ribonucleic acid (RNA) metabolism of the renal tissue have been reported recently (1). They are: RNA content and concentration, orotic acid-c14 incorporation into RNA and acid soluble nucleotide pool, intracellular localization of the newly synthesized RNA, and the specific activity of enzymes of the de novo pyrimidine biosynthesis pathway. The present report describes the light and electron microscopic observations in these animals. For light microscopy, kidney slices were fixed in formalin, embedded, sectioned, and stained with H & E and PAS.

Trichosanthes dioica mediated biochemical alterations in STZ induced diabetic rats

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
DK Rai ◽  
PK Rai ◽  
B Sharma ◽  
G Watal
Keyword(s):  
Diabetic Rats ◽  
Biochemical Alterations ◽  
Trichosanthes Dioica

Platelet-activating factor and the kidney

1986 ◽  
Vol 251 (1) ◽  
pp. F1-F11 ◽  
Author(s):  
D. Schlondorff ◽  
R. Neuwirth
Keyword(s):  
De Novo ◽  
Mesangial Cells ◽  
Biological Activities ◽  
Platelet Activating Factor ◽  
Calcium Ionophore ◽  
Initial Step ◽  
Renal Physiology ◽  
Dependent Manner ◽  
Glomerular Mesangial Cells ◽  
Isolated Kidney

Platelet-activating factor (PAF) represents a group of phospholipids with the basic structure of 1-alkyl-2-acetyl-sn-glycero-3-phosphocholine. A number of different cells are capable of producing PAF in response to various stimuli. The initial step of PAF formation is activation of phospholipase A2 in a calcium-dependent manner, yielding lyso-PAF. During this step arachidonic acid is also released and can be converted to its respective cyclooxygenase and lipoxygenase products. The lyso-PAF generated is then acetylated in position 2 of the glycerol backbone by a coenzyme A (CoA)-dependent acetyltransferase. An additional pathway may exist whereby PAF is generated de novo from 1-alkyl-2-acetyl-sn-glycerol by phosphocholine transferase. PAF inactivation in cells and blood is by specific acetylhydrolases. PAF exhibits a variety of biological activities including platelet and leukocyte aggregation and activation, increased vascular permeability, respiratory distress, decreased cardiac output, and hypotension. In the kidney PAF can produce decreases in blood flow, glomerular filtration, and fluid and electrolyte excretion. Intrarenal artery injection of PAF may also result in glomerular accumulation of platelets and leukocytes and mild proteinuria. PAF increases prostaglandin formation in the isolated kidney and in cultured glomerular mesangial cells. PAF also causes contraction of mesangial cells. Upon stimulation with calcium ionophore the isolated kidney, isolated glomeruli and medullary cells, and cultured mesangial cells are capable of producing PAF. The potential role for PAF in renal physiology and pathophysiology requires further investigation that may be complicated by 1) the multiple interactions of PAF, prostaglandins, and leukotrienes and 2) the autocoid nature of PAF, which may restrict its action to its site of generation.

scholarly journals Phenotypic manifestation of α-synuclein strains derived from Parkinson’s disease and multiple system atrophy in human dopaminergic neurons

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Benedict Tanudjojo ◽  
Samiha S. Shaikh ◽  
Alexis Fenyi ◽  
Luc Bousset ◽  
Devika Agarwal ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Multiple System Atrophy ◽  
Neuronal Death ◽  
Dopaminergic Neurons ◽  
De Novo ◽  
Dependent Manner ◽  
Human Neurons ◽  
Phenotypic Manifestation ◽  
Induced Aggregation

Abstractα-Synuclein is critical in the pathogenesis of Parkinson’s disease and related disorders, yet it remains unclear how its aggregation causes degeneration of human dopaminergic neurons. In this study, we induced α-synuclein aggregation in human iPSC-derived dopaminergic neurons using fibrils generated de novo or amplified in the presence of brain homogenates from Parkinson’s disease or multiple system atrophy. Increased α-synuclein monomer levels promote seeded aggregation in a dose and time-dependent manner, which is associated with a further increase in α-synuclein gene expression. Progressive neuronal death is observed with brain-amplified fibrils and reversed by reduction of intraneuronal α-synuclein abundance. We identified 56 proteins differentially interacting with aggregates triggered by brain-amplified fibrils, including evasion of Parkinson’s disease-associated deglycase DJ-1. Knockout of DJ-1 in iPSC-derived dopaminergic neurons enhance fibril-induced aggregation and neuronal death. Taken together, our results show that the toxicity of α-synuclein strains depends on aggregate burden, which is determined by monomer levels and conformation which dictates differential interactomes. Our study demonstrates how Parkinson’s disease-associated genes influence the phenotypic manifestation of strains in human neurons.

Enhanced accumulation of pinosylvin stilbenes and related gene expression in Pinus strobus after infection of pine wood nematode

2021 ◽  
Author(s):  
Hwan-Su Hwang ◽  
Jung Yeon Han ◽  
Yong Eui Choi
Keyword(s):  
Transcription Factors ◽  
Defense Mechanisms ◽  
De Novo ◽  
Pinus Strobus ◽  
Pine Wilt Disease ◽  
Monomethyl Ether ◽  
Bursaphelenchus Xylophilus ◽  
Nematicidal Activity ◽  
Dependent Manner ◽  
Pine Wood

Abstract Pine wood nematodes (PWNs: Bursaphelenchus xylophilus) infect pine trees and cause serious pine wilt disease. Eastern white pine (Pinus strobus) has resistance to PWN. However, the detailed defense mechanisms of P. strobus against PWN are not well known. When P. strobus plants were infected with PWNs, the accumulation of stilbenoids, dihydropinosylvin monomethyl ether (DPME) and pinosylvin monomethyl ether (PME), were increased remarkably. DPME and PME had the high nematicidal activity. Interestingly, the nematicidal activity of the two compounds was resulted in a developmental stage-dependent manner. PME was more toxic to adult PWNs than juveniles, whereas DPME was found more toxic to juvenile PWNs than the adults. The genes involved in PME and DPME biosynthesis such as phenylalanine ammonia-lyase (PAL), 4-coumarate-CoA ligase (4CL), pinosylvin synthase (STS), and pinosylvin O-methyltransferase (PMT) were isolated using de novo sequencing of the transcriptome in P. strobus. In addition, transcription factors (bHLH, MYB and WRKY) related to stilbene biosynthesis were isolated. qPCR analyses of the selected genes (PAL, 4CL, STS, and PMT) including transcription factors (bHLH, MYB and WRKY) revealed that the expression level of the selected genes highly enhanced after PWN infection. Our results suggest that pinosylvin-type stilbenoid biosynthesis is highly responsive to PWN infection and plays an important role in PWN resistance of P. strobus trees.

scholarly journals Treatment of de novo coronary artery lesions with paclitaxel drug coated balloons (DCB) in diabetic and non-diabetic patients

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
K.M.Z Mohd Saad Jalaluddin
Keyword(s):  
Myocardial Infarction ◽  
Coronary Artery ◽  
De Novo ◽  
Target Lesion ◽  
Diabetic Group ◽  
Target Lesion Revascularization ◽  
Diabetic Patients ◽  
Coronary Artery Lesions ◽  
Artery Disease

Abstract Background Drug-coated balloon has been widely used to treat In-Stent Restenosis as recommended by ESC/EACT coronary intervention guideline. However, trials of effectiveness of DCB in treating de novo lesions in diabetic patients are limited. This study will highlight the impact of DCB in diabetic patients with only de novo lesions against non-diabetic patients. Aim To compare the outcomes of Paclitaxel Drug Coated Balloon (DCB) in Diabetic and non-diabetic patients with only de novo coronary artery disease. Methods A retrospective, single center study was conducted from January 2016 till December 2018. All diabetic and non-diabetic patients underwent angioplasty to only de novo coronary artery lesions were included in the study. Patients' baseline characteristic, angiographic data, post procedural and 12 months follow-up outcomes including major adverse coronary artery event (MACE), target lesion revascularization (TLR) and myocardial infarction (MI) are compared. Results A total of 1257 patients (726 diabetic and 531 non-diabetic patients) with total 1385 de novo coronary artery lesions (791 lesions in diabetic group and 594 lesions in non-diabetic group) were included in this study. Mean age for non-diabetic group was 57.6±10.6 years and diabetic group was 59.6±9.6 years with male predominance (91.1% in non-diabetic group, n=484 and 79.2% in diabetic group, n=575). Majority of diabetic group has hypertension (83.7%, n=608 vs 58.6%, n+311), chronic renal failure (10.3%, n=75 vs 1.9%, n=10), documented coronary artery disease (55.6%, n=404 vs 47.5%, n=252) and previous coronary angioplasty 39.5%, n=287 vs 28.8%, n=153). Adequate pre-dilatation was done in both groups (98.5%, n=585 in non-diabetic group and 99.4%, n=786 in diabetic group; p=0.000). Mean DCB diameter and length were almost similar in both groups. Mean residual stenosis after DCB was 11.15±16.9% in non-diabetic group and 13.13±13.4% in the diabetic group (p=0.008). 74.6% of non-diabetic group (n=396) and 77.1% of diabetic group (n=560) were on double antiplatelet therapy for 12 months. 86.8% (n=461) of non-diabetic and 88.4% (n=642) of diabetic patients were available for follow up. MACE events were significantly higher (p=0.000) in diabetic group (4.3%, n=31) as compare to non-diabetic group (0.6%, n=3). Target lesion revascularization (TLR) and myocardial infarction (MI) was also significantly higher in diabetic group (TLR 1.4%, N=10 vs 0.6%, n=3, p=0.049; MI 2.6%, n=19 vs 0.4%, n=2, p=0.002). Conclusion Treating de novo coronary lesions in diabetic patients with DCB associated with significantly higher MACE events, target lesion revascularization and myocardial infarction. Diabetic patients appear to have a greater volume of atherosclerotic plaque and increased propensity for atherosclerotic plaque rupture. Funding Acknowledgement Type of funding source: None

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